larryhammer: photo of Enceladus (the moon, not the mythological being), label: "Enceladus is sexy" (enceladus)
[personal profile] larryhammer
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Why shoelaces eventually come undone. Short answer: when your foot comes down, the sudden stop tugs a very tiny bit on the free ends of the bow, and the tiny tugs build up. (via)

A solar-powered device that condenses water out of low-humidity air. Mind you, that 20% humidity is pretty moist for a desert: our evaporative cooler works effectively only below that, which is most of the time outside of rainy season. Good stuff anyway.

There is heat below the surface of Enceladus. (via)

---L.

Subject quote from "Dirge for Two Veterans," Walt Whitman.

Date: 15 April 2017 05:11 am (UTC)
thistleingrey: (Default)
From: [personal profile] thistleingrey
Hm, interesting. My laces usually come undone (on the one pair that has laces) from jeans-hem drag.

Date: 17 April 2017 08:45 pm (UTC)
thistleingrey: (Default)
From: [personal profile] thistleingrey
I wonder, too. Someone may've thought of it while putting together the Economist write-up: that photo is of someone wearing shorts, emphatically.

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